Large Plant Propagator (3 Pack) - Grow Vegetable Seedlings, Plants, Herbs, Garden Flowers and Wheatgrass indoors. Protects plants from frost, keeps plants warm and makes growing easy. 3 Pack of 21.5" x 11" x 10" Plant Propagators. Lightweight, extremely durable and includes a fully adjustable air vent. Transparent UV protected PVC construction. Molded handle for easy removal. Provides a protective barrier against frost, snow, hail, wind, insects, hungry animals. Protects while allowing plant to receive sunlight and greenhouse-like warmth. Helps plants retain moisture and encourages strong root growth.